Recruitment services and you

First of all I wanted to explain what a recruitment service is. A recruitment service is basically a company that links you to a company for you to find a job.
Now the thing is, you have nothing to lose by signing up on one of these sites.
These sites win money because businesses pay to be on their site and pay for the company to find them workers that could interest them. Now for these companies to work, they need a huge user base (many people wanting to get a job through the service). To be appealing to the workers they need to offer a free, well done service.
So when you sign up for these sites, you are the one who the service is trying to link to companies that want workers.
Now the question you should ask yourself is why would you not want to be contacted by companies that want you as their worker? It does not take long to get listed by these sites like that companies can contact you. In reality, these companies try to make their service as enjoyable and short as possible, to deliver you, the user, a pleasing experience.
Even if you do have a job, maybe you can find a better one, one that pays more or that you will enjoy more. You basically have nothing to lose by signing up for these sites.
I recommend trying out this site: jobs in finance